Have you had a fall? Even a minor no pain at time one?
Just asking as I had a trivial fall 2 days before my rapid onset and that is what my DR is banking on for the cause (I do have history for damaged disk).

All my research backs up the rapid onset is not disease related normally but injury or toxin related.

Also do you have a referral to a specialist? I'm still waiting the 90 days for that so am not currently having any treatment other than the drugs.